/Engine/Source/Runtime/Landscape/Classes/LandscapeProxy.h
Creates a Texture2D for use by this landscape proxy or one of it's components for tools .
[UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * CreateLandscapeToolTexture ( int32 InSizeX, int32 InSizeY, TextureGroup InLODGroup, ETextureSourceFormat InFormat ) const